Mitsubishi Electric MXZ-24UV - Manual

Page 2 - TECHNICAL CHANGES

2 TECHNICAL CHANGES 1 MXZ-24UV - ➔ MXZ-24UV - 1. Combinations of the connectable indoor units have increased.2. Noise filter P.C. board has changed to improve the capacity for protecting the inverter-controlled circuit when the voltage higher than the rated one is aupplied with the inverter-controll...

Page 3 - PART NAMES AND FUNCTIONS; OUTDOOR UNIT; Air inlet; Model indication

3 PART NAMES AND FUNCTIONS 2 OUTDOOR UNIT Air inlet Air outlet (back and side) Model indication MXZ-24UV-MXZ-24UV- E2 E1 OB287--1.qxp 03.1.16 10:29 AM Page 3

Page 4 - INDOOR / OUTDOOR CORRESPONDENCE TABLE; There is no combination other than this table.; Combination of the connectable indoor units

4 3 INDOOR / OUTDOOR CORRESPONDENCE TABLE ❈ There is no combination other than this table. MXZ-24UV- E1 , MXZ-24UV- E2 OUTDOOR UNIT Combination of the connectable indoor units 07+07 07+09 07+12 07+18 09+09 09+12 09+18 12+12 12+18 18+18 07+07+07 07+07+09 07+07+12 07+07+18 07+09+09 07+09+12 07+09+18 0...

Page 5 - INDOOR UNITS COMBINATION

5 07 09 12 18 07+07 07+09 07+12 07+18 09+09 09+12 09+18 12+12 12+18 18+18 07+07+07 07+07+09 07+07+12 07+07+18 07+09+09 07+09+12 07+09+18 09+09+09 09+09+12 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 3.62 4.35 6.96 11.11 7.44 7.83 11.01 14.40 9.18 13.19 14.40 14.40 14.40 14.4...

Page 7 - SPECIFICATION

7 5 SPECIFICATION Outdoor model Indoor units number Indoor units total capacity (Connectable) Indoor units total capacity (Simultaneous operation) Piping total length Connecting pipe length Height difference (Indoor ~ Outdoor) Height difference (Indoor ~ Indoor) Function Capacity Dehumidification Ou...

Page 8 - NOISE CRITERIA CURVES; OCT; BAND CENTER FREQUENCIES, Hz

8 NOISE CRITERIA CURVES 6 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATETERESHOLD OFHEARING FORCONTINUOUSNOISE NC-60 NC-50 NC-40 NC-30 NC-20 NC-70 OCT A VE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR BAND CENTER FREQUENCIES, Hz Test conditions. Cooling :DB35 : WB24 :...

Page 9 - OUTLINES AND DIMENSIONS

9 OUTLINES AND DIMENSIONS 7 MXZ-24UV -MXZ-24UV - E2 E1 Unit: mm OUTDOOR UNIT 23 10 35 320 900 88 460 50 900 250 381.8 531.3 317 23 33 Handle formoving Air in Indoor and outdoorconnect wiring23 ✕ 45 hole Air in C unit connection B unit connection A unit connection 6.35 (flared) 1/4 Liquid pipe 12.7 (...

Page 10 - WIRING DIAGRAM

10 WIRING DIAGRAM 8 POWER SUPPLY~/N 230V 50Hz INDOORUNIT (A) CIRCUIT BRAKER TB1 TB2 TB3 TB4 BLURED TB5 X64 GRN/YLW GRN CN720 CN601 0 4 X64 LD62 CN913 CN791 CN901 6 4 2 CN902 CN851 CN852 MF61 21S4 1 2 21 21 1 2 12 3 4 1 2 3 4 5 6 12345 67 1 2 3 4 5 6 C65 LD63 LD64 LDB LDB LD61 LDE L61 F911 SSR61 X63 ...

Page 11 - REFRIGERANT SYSTEM DIAGRAM

11 REFRIGERANT SYSTEM DIAGRAM 9 ● Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes,refer to the tables below. ● When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe. For further...

Page 12 - PERFORMANCE CURVES

12 10 The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions,since operating conditions vary according to the areas where these units are installed. The following information has been pro-vided to clarify the operating character...

Page 13 - 0-2.Capacity and input correction by inverter output frequency

13 10-2.Capacity and input correction by inverter output frequency (OUTDOOR UNIT:MXZ-24UV) NOTE 1 : The dotted line on graphs connects the frequency range in normal operation shown by the full line and the frequency in test run shown by the point. 0 50 100 150 0.5 1.0 1.5 <COOL>Capacity Freque...

Page 14 - 0-3.Outdoor low pressure and outdoor unit current; Outdoor low pressure

14 10-3.Outdoor low pressure and outdoor unit current 1. 07-class unit in single operation NOTE:The unit of pressure has been changed to MPa on the international system of units(SI unit system). The converted score against the traditional unit system can be gotten according to the formula below. 1(M...

Page 18 - MICROPROCESSOR CONTROL; INVERTER MULTI SYSTEM CONTROL

18 MICROPROCESSOR CONTROL 11 Compressorpowerfactor Indoor unitmicroprocessor SSR61 Drive circuit Transistor module Indoor Unit A Indoor Unit C Indoor Unit B Gas pipetemperaturethermistorRT66, 67, 68 Muffler Accumulator Comp. H.P.S 63H2 Discharge temperature thermistor RT61 Indoor Unit A Evaporationt...

Page 22 - 1-5.Discharge temperature protection control

22 11-3.Heat defrosting control (1) Conditions to enter defrosting mode 1 . When temperature of defrosting thermistor is -3 ; or less. 2 .When specified non-defrosting time, is counted in the control p.c.board is satisfied. (Total time of compressor operating)Going to defrosting mode at both conditi...

Page 23 - 1-6.Refrigerant recovery control on heating; 1-8.Relation between main sensor and actuator

23 <Control status> The control performs when the following status are satisfied everything;• When there is 1 unit or more not operating indoor unit on heat operation. (Excluding thermo OFF)• When discharge temperature becomes 107 ; or more. • When it passed 60 minutes or more since the operat...

Page 24 - TROUBLESHOOTING

24 12 TROUBLESHOOTING 3. Troubleshooting procedure 1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work. 2) If the electr...

Page 28 - Check of serial signal; Check of power supply

28 B B Check of serial signal Turn on power supply No Yes Yes No No Yes No Yes Start Check the connecting of main circuit parts and connector (CN501: I.P.M P. C. board, CN 801: Electronic control P. C. board, CN554: relay P. C. board) Is there voltage of 230V AC in the power supply terminal block? I...

Page 32 - Check of HPS; The other cases; then turn them back ON.

32 H H Check of HPS Infinity 0 " Yes No Yes Start 1. Disconnect the connector CN722 in the electronic control P. C. board.2. Check the resistance of HPS after 1 minutes have passed since the outdoor unit power supply was turnd off. Check the resistance between each terminal? Return CN722 to form...

Page 35 - Short

35 I.P.M P.C.boardMXZ-24UV - MXZ-24UV - E2 E1 Relay P.C.boardMXZ-24UV - MXZ-24UV - E2 E1 { { { { Short 12V DC High pressure switch 12V DC { 12V DC { 12V DC { 320V DC OB287--2.qxp 03.1.16 10:30 AM Page 35

Page 36 - DISASSEMBLY INSTRUCTIONS

36 OPERATING PROCEDURE PHOTOS 1.Removing the compressor(1)Remove the screws of the service panel, and remove it. Recover refrigerant gas. (2)Remove the screws of the top panel , and remove it.(3)Remove the screws of the front panel , and remove it.(4)Disconnect the compressor lead wire.(TAB64,TAB65,...

Page 39 - PARTS LIST

39 14 Part numbers that are circled are not shown in the illustration. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 T2W E40 301 M21 17A 501 M21 17E 337 T2W E89 451 T2W E79 424 T2W G01 424 T2W E58 376 T2W E70 308 M21 42A 340 M21 42A 308 T2W E65 375 T2W E70 398 T2W E88 307 M21 17A 362 T2W G01...

Page 42 - OPTIONAL PARTS

15-1. Different-diameter pipe For different-diameterpipes MXZ-24UV MAC-454JP MAC-455JP MAC-456JP Model name Connected pipes diameter (mm) { 9.52 — { 12.7 (3/8) (1/2) { 12.7 — { 9.52 (1/2) (3/8) { 12.7 — { 15.88 (1/2) (5/8) 15-2. Outlet guide Changes air discharge direction. Applied unit Model name M...

Mitsubishi Electric MXZ-24UV - Manual

Table of Contents:

Summary

Other Mitsubishi Electric Models